Maybe you can install it, but i do not recommend it, as
@MalwareHunter said...if u use Tor for privacy, you should take it more seriously by not using LastPass, and if you think you really need password manager, then you should go grab and use KeePass instead, its open sourced password manager, easy to use and store your data locally, why you store your data in the cloud (privacy issues) when you can keep it by your self offline (locally). Besides as also
@Fedora quoted from official site..using 3rd party plugins could risk to reveal your real IP address.
-Is Tor safe to use?
Well you should ask it in more specific way, if you mean by "Can I use Tor for internet banking?" uhm..I am not really sure, since our posts is read by public...all I can say is before you use Tor for internet banking you should do some research it , and unless you are very confident and had proof about Tor is safe to use for internet banking then I do not recommend it for internet banking, why? because Tor has risk "Man in the middle attack" well of course that is from what I heard, I am not really sure tho. From what I understand behind how Tor browser work.
Let's say..I want to deliver a message to you, instead by delivering this message directly to you, I give this message to Fedora, and Fedora give my message to Tony Cole, then Tony Cole give my message to Scot and finally Scot give my message to you. So can anyone open/read my message? yes perhaps..they (Fedora/Tony Cole/Scot) perhaps can read/open my message although Tor claim that no one would be able to open it except you (my target) but who knows right? probably they can't at this moment, but once they can...it would be very dangerous, so I rather not use it for internet banking if I were you, better safe than sorry.
But in Privacy perspective, Yes..I am very confident Tor hide your identity very seriously, that's why Tor is commonly used for privacy matters, and Tor has good reputation regarding this matter, why? because...like what I illustrated before..instead of delivering my message directly to you, I gave it to some people, Fedora never know where this message from, he think I was another guy deliver my message through him, and once Fedora give my message through Tony Cole, Tony didn't know either whether Fedora was the 1st person want to give his message through him, so only you (my target) know that I was the 1st person want to give this message through some people, this way..if Mr.X want to track my message, he would find difficult way to track it, because I handed it over through some people. Mr X never know whether me/Fedora/Tony Cole/Scot was the 1st person want to deliver this message to you. The more people using Tor, then Tor become stronger (due to the fact Tor has many people to route its traffic).
But of course what I am saying could be wrong, again I do not recommend it to use Tor for internet banking purpose unless you are very confident with it, but if you use it for Anonymity purpose, then go ahead, and good luck for whatever people trying to track you down

I also read somewhere now even google tracking people who gonna search "Tor browser" or even download it.